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Fix ArrayIndexOutOfBoundsException in ThrowableStackTraceRenderer when the stack trace is mutated concurrently #3955

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Fix ArrayIndexOutOfBoundsException in ThrowableStackTraceRenderer when the stack trace is mutated concurrently #3955

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@mosche mosche commented Oct 14, 2025 •
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Fix ArrayIndexOutOfBoundsException in ThrowableStackTraceRenderer if concurrently modifying the stack trace of a Throwable while rendering it

Closes #3940

This was referenced Oct 14, 2025
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@vy vy self-assigned this Oct 15, 2025
@vy vy changed the title Fix ArrayIndexOutOfBoundsException in ThrowableStackTraceRenderer when concurrently mutating the stacktrace Fix ArrayIndexOutOfBoundsException in ThrowableStackTraceRenderer when the stack trace is mutated concurrently Oct 17, 2025
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vy approved these changes Oct 17, 2025
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@mosche, thanks so much for the contribution. I've confirmed that both tests (the new one, and the old one of #3929) fail in the absence their associated fixes.

@vy vy enabled auto-merge (squash) October 17, 2025 13:04
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mosche commented Oct 17, 2025

Ugh, sorry, I missed configuring git to sign commits for this repo. My bad! Are you ok if I rewrite the history here? Sorry for that, you'll have to fix your commits afterwards then

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mosche commented Oct 17, 2025

Thanks for the quick response here btw!

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ThrowableStackTraceRenderer can throw an ArrayIndexOutOfBoundsException when rendering a Throwable with a concurrently-mutated stacktrace

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